The manufacturing, as one of the main links between resource consumption and environmental emissions, is poorly documented in terms of carbon footprint. There lacks a holistic concept to calculate the CO2 emissions emitted in product producing and to recognize the reduction opportunities. On this account this paper proposes a systematic approach to calculation of the emissions with using a hybrid emission analysis model. The paper shifts the perspective of lifecycle assessment (LCA) from the conventional entire product life cycle emphasis to the manufacturing phase. This approach permits identification of opportunities for reducing CO2 emissions at the process level and driving the manufacturing system towards low carbon.